Electrically-heated water-containing radiator.



0. A. PALMER.

ELECTRICALLY HEATED WATER CONTAINING RADIATOR. APPLICATION FILED MAR. 9, |917.

` openings 2.

OTTO A. PALMER,

OF WAYZA'IA, MINNESOTA, ASSIGNOR O ONE-HALF TO PAUL W.

TIBBITS, 0F WAYZATA, MINNESOTA.

ELECTRICALLY-HEATED WATEB-CONTAINING RADIATOR.

Specification of Letters Patent.

Patented Sept. 25, 1917.

Application led 'March 9, 1917. Serial No. 153,541.

To all whom t may concern Be it known that I, OT'ro A. PALMER, a citizen of the United States, residing at Wayzata,- in the county of Hennepin and State of Minnesota, have invented certain new and useful Im-provements in Electrically-Heated Water-Containin Radiators; and I do hereby declare the fo owing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make 'and use the same.

My invention relates to improvements in electrically heated water-containing radiators; and, to this end, it consists'of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the single view of the-.accompanying drawing.

The numeral 1 indicates a hot water radiator of standard construction andl comprises a plurality of radiator sections having therein upper and lower axially eating openings 2. In the end sections of the radiator, are internally threaded bossed openings 3 axially alined with the respective The delivery end of a hot water feed pipe 4 is screwed into the upper right hand opening 3 and the receiving end of a cold water return pipe 5 is screwed into the lower right hand opening 3. A hand valve 6 is provided for opening and closing the cold water return pipe 6.

A tubular casin 7 is inserted through the lower left han opening 3 and into the lower communicating openings 2. On the outer end of the casing is a plug 8, which is screwed into the respective opening 2 and from which plug the casing 7 is entirely supported with its inner end terminatingl short of the adjacent opening 3. Within t e casing 7, is a heating element 9 and the feed wires 10 therefor are extended through suitably insulated openings in the plug 8.. automatic control, diagrammatica ly illustrated and indicated as an entirety by the numeral 11, is provided for automatically turning on and off the current to the heating element 9. A sight tube 12 connects the horizontal sections of the pipes 4 and 5.

vWhen the heating element is used for heat` ing the radiator 1, the water Z is partly drained from said radiator to substantially the level, as the same appears inthe sight tube 12. After the water Z is drawn down valve 14.

alined communito the proper level,l the valve 6 is closed. By supporting the casing 7 at one end only, the water Z is free to circulate completely therearound.

Inserted through the upper left hand opening 3 and into the alined communicating openings 2, is a vacuum pump, indicated as an entirety by the numeral 13. This vacuum pump 13 has screw-threaded engagement with the respective bossed opening 3 and is entirely supported therefrom. On the outer projecting end of the vacuum pump 13, is a combined relief and signal Supported on the horizontal section of the pipe 4, is a combined vacuum and presser gage, indicated as an entirety by the numeral 15, and having communication with the interior of'said pipe.

It is, of course, understood that my present invention can also be used in connection with the radiators of steam or vapor systems. One of the objects of the invention is to so construct the same that it `can be readily and easily applied to standard radiators.A By manipulating the pump 13, a partial vacuum may be produced inthe radiator to reduce the pressure on the water Z, so that the same will vaporize at a low temperature.

The above described invention, while simple and of comparatively small cost to install in radiators of standard construction, has, in actual usage,'proven highly efficient for the purpose had in vieW.

1. An electric radiator having a supply of liquid therein, a heating element in said liquid, and means for producing a partial vacuum in the radiator.

2. An electric radiator comprising a plurality lof radiator sections having alined top and bottom communicating openings and a supply of liquid therein, a heating element mounted in said bottom openings and in the liquid, anda vacuum pump mounted in said top openings for producing a partial vacuum in the radiator.

3. An electric radiator comprising a plurality of radiator sections having alined communicating openings at the bottoms thereof and a supply of liquid therein, an external opening in the radiator alined with said communicating openings, and a heating element inserted through said alined openings into the liquid, said heating element i having at its outer end a plug secured in said external opening and from which plug the heating element 1s supported.

4. An electric radiator comprising a plurality of radiator sections havin top and bottom alined openings extending completely therethrough and a suppl of liquid therein, the intermediate of sai openings affording communication between the radiator sections and the others thereof bein external openings, a heating element secure in one of the external openings and extend- 

